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Miguel Ángel
a41da86517
A font filename encodes more than a weight, but only the weight was ever read out of it, so two faces of one family collapsed onto a single slot. Google Fonts ships Newsreader as Newsreader-Italic-VariableFont_opsz,wght.ttf and Newsreader-VariableFont_opsz,wght.ttf. The italic sorts first, both scored 400, so the italic claimed the family's only 400 slot, the upright was dropped as a duplicate, and the surviving face was declared with no font-style at all. @font-face is deliberately global — the composition CSS scoper exempts it, since a face declaration cannot be scoped — so mounting captions re-pointed the whole document's Newsreader at the italic file and every sibling composition rendered in italics. Faces now carry a font-style descriptor and dedupe on weight AND style. The same fix had to land in build-frame.mjs, which renames captured fonts BEFORE captions.mjs sees them. It dropped the style token while renaming, so an italic file arrived as "Newsreader-Regular.ttf" and was then asserted upright — leaving the global normal slot pointing at italic bytes even once brandFontFaces understood styles. The staged filename is a contract: it must carry every axis that distinguishes one face from another, and the dedup key must be the whole face. Second axis, same misparse: weight parsing matched WORDS only, so a Fontsource capture (inter-latin-500-normal.woff2) scored a whole family 400 and shipped one of its faces. A numeric axis in the filename now wins over the word heuristic, anchored so it is not read out of the middle of a hash-named capture file — a non-digit before it and no alphanumeric after, which keeps both the 4-digit guard and separator-free names like Roboto900.ttf. Tests pin both ends of the contract: a round-trip asserting the names build-frame stages map back to the right weight+style through the real brandFontFaces, plus a source check that no copy reverts to a weight-only name or a hardcoded font-style:normal. captions.mjs also gains a parity pin across the three workflows that ship it. Not addressed: a VariableFont file is still declared at a single font-weight rather than its range, so weights it could interpolate are still synthesized.